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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - border-image-slice distorted when using with border-width"
   href="https://bugs.webkit.org/show_bug.cgi?id=229803">229803</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>border-image-slice distorted when using with border-width
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Safari 14
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>CSS
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>brandon@dreamthinkbuild.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=437145" name="attach_437145" title="Browser screenshots">attachment 437145</a> <a href="attachment.cgi?id=437145&action=edit" title="Browser screenshots">[details]</a></span>
Browser screenshots

`border-image-slice` in all other browser rendering engines maintains aspect ratio and displays more or fewer of the `border-image` as the `border-width` increases or decreases. Only on WebKit, does the `border-image` stretch/squish and distort the aspect ratio rather than displaying more or fewer `border-image` instances.

This can be reproduced reliably in any environment, and can be seen on the MDN docs page for `border-image-slice`. Scroll down to the interactive preview and drag the `border-width` range slider handle either left or right while keeping the `border-image-slice` handle stationary at 30. In Safari/WebKit, you will see the `border-image` become distorted, whereas in other browsers you will see the border shrink or grow and fit in more or fewer `border-image` instances.

MDN `border-image-slice` example intrapage link: <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/border-image-slice#result">https://developer.mozilla.org/en-US/docs/Web/CSS/border-image-slice#result</a>



I have attached screenshots of WebKit vs. Firefox/Chrome.</pre>
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